print("num1")
num1=int(input())
print("num2")
num2=int(input())
print("enter your operator +,-,/,*")
num3=(input())
if num1==56 and num2==3 and num3=="*":
 print("555")
elif num1==45 and num2==6 and num3=="+":
 print("77")

elif num3=="+":
    plus=num1+num2
    print(plus)


elif num3 == "*":
    mul = num1 * num2
    print(mul)


elif num3 == "/":
    div= num1 / num2

    print(div)


elif num3 == "-":
    sub = num1 - num2
    print(sub)